EP 0210920 B1 19890426 - APPARATUS FOR THE CATHODIC PROTECTION OF A STRUCTURE BY AN APPLIED CURRENT
Title (en)
APPARATUS FOR THE CATHODIC PROTECTION OF A STRUCTURE BY AN APPLIED CURRENT
Publication
Application
Priority
FR 8511259 A 19850723
Abstract (en)
[origin: US4713158A] The system includes means for cyclically putting into operation a circuit for controlling and regulating a DC generator connected between the structure to be protected which constitutes a cathode and the anodes of a group of anodes which are insulated from the structure and are in contact with the electrolyte in which said structure is placed. The circuit includes means for reading the potential provided by a reference electrode, for calculating the potential difference between the structure and the electrode potential as read, and for comparing the calculated potential difference with upper and lower thresholds. The value of the voltage output from the generator may be adjusted by means in steps of predetermined value as a function of the comparison signals delivered by the comparator. The system is particularly applicable to protecting underground or underwater metal structures from corrosion.
IPC 1-7
IPC 8 full level
C23F 13/04 (2006.01); G01R 17/02 (2006.01)
CPC (source: EP KR US)
C23F 13/04 (2013.01 - EP US); C25D 21/12 (2013.01 - KR); G01R 17/02 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0210920 A1 19870204; EP 0210920 B1 19890426; AU 582979 B2 19890413; AU 6042186 A 19870129; CA 1282368 C 19910402; CN 86105112 A 19870513; DE 3663040 D1 19890601; FR 2589486 A1 19870507; FR 2589486 B1 19910906; KR 870001335 A 19870313; NZ 216935 A 19890224; US 4713158 A 19871215
DOCDB simple family (application)
EP 86401638 A 19860722; AU 6042186 A 19860722; CA 514516 A 19860723; CN 86105112 A 19860722; DE 3663040 T 19860722; FR 8511259 A 19850723; KR 860005941 A 19860722; NZ 21693586 A 19860722; US 88721486 A 19860721